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C1233
The speed sensor is integral to the hub & bearing assembly. If it is bad, you have to change the assembly. First check that the connector is clean, tight and plugged in.

B0429
Seems to be a rather common DTC. It means that the rear air mix door is not exactly where it is commanded. In other words, it is commanded at 40 degrees open and it is reporting 42 degrees. I had the same code and the dealer tech told me that it does not take much variation to trip that code. Since I was having no problem with rear seat heat, I told them to leave it along even though it is still under warranty.

Super Moderator

Last hub & bearing assembly I did was on my '92 Deville. Got it from Napa for $200. Took me less than an hour. I'm just guessing but I'd guess a shop would charge about $400 maybe. Dealer probably more. Check the connection first. Make sure that they didn't knock the plug loose.

edit:
Correction, last 3 I did were on a Ford Snorus. Now those took several hours.

I was wondering if there is a way to reset the security system in a 2000 devel gold edition. Drove it one day and the next the security light was on and the car will not start. The lights come on but nothing happens when I turn the key. Is there any way to avoid taking it to the dealership?? Any...

So I had my 2001 Deville die on me due to dead battery .. first my traction control light came on then a few others ,the battery light finally came on then shortly after ,the dash went black ! Long story short car died ,dead battery ... thinkin it is the alternator I got a new battery to be able...

I have a 91 deville with a 4.9l. I have done a lot of diagnostic for a apparent miss. I had a tune up which was supposed to be new plugs, wires, fuel filter, cap, and button. That was a year ago.
Still, the miss continued. I speculated on this board about it possibly being the fuel pump. I...

Where are the ground connections for 1996 deville? I know theres one in the coil pack one to the right of the battery near right headlamp and one next to the belt tensioner. I cleaned the terminals and contact surface with wire brush. Anymore grounds ? (grounds that are exposed to outside elements)